Broken or short drill detector



Oct. 22, 1940. E. c. CARRIS 2,218,872

BROKEN OR SHORT DRILL DETECTOR Filed Sept. 28, 1938, la Sheets-Sheet 1 w v 27 Z5 J? /7 INVENTOR. v T ,dflWCC/ww BY 75w 9&z

ATTORNEYS Oct. 22, 1940. 2,218,872

BROKEN OR SHORT DRILL DETECTOR Filed Sept. 28, 1958 2 Sheets-Sheet 2 W My f. 4/ 2g '64 4? /4 J 4- 4 f 25 4 5 a L 324 6 :24 5 2 v 9 HI?! 4/5 4/ 50 f 0 m f 'III? N +5 I/ 7 j I I 25 44/ Patented Oct. 22, 1940 UNITED STATES PATENT OFFICE BROKEN OR SHORT DRILL DETECTOR Application September 28, 1938, Serial No. 232,117

Claims.

My invention relates to a broken or short drill detector adapted for use in operative association with pearl button making machines.

Where pearl button making machines of the 5 automatic type are employed, it is highly desirable to provide a means whereby short or broken drills in the machine may be detected, an audible or visible signal given and the machine stopped so that a full length drill may be inserted before the wasteful operation of the machine.

More particularly, it is my object to provide a broken or short drill detector of simple, inexpensive construction, whereby a broken or short drill in the button making machine will efiect the operation of mechanism,- whereby a signal may be given or the machine stopped.

My detector as here shown involves means whereby if the drill is of proper length, the detector mechanism is rendered inoperative, but if the drill is short or broken, the detector mechanism will operate.

With these and other objects in View, my invention consists in the construction, arrangement and combination of the various parts of my broken or short drill detector whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims, and illustrated in the accompanying drawings, in which:

Figure 1 shows a side elevation of a broken or short drill detector embodying my invention.

Figure 2 shows a front elevation of a part of my improved mechanism.

Figure 3 is a top or plan view illustrating particularly the bracket for mounting the detector mechanism on the cam track on the button making machine.

Figure 4 is a horizontal, detail, sectional view taken on the line 4-4 of Figure 1.

Figure 5 is a detail, sectional view taken on the line 55 of Figure 4.

Figure 6 is an enlarged, side elevation, partly in section on the line 66 of Figure 4.

Figure 7 is a view similar to Figure 6, showing the parts in a different position, to-wit, that assumed when they are actuated by a full length drill.

Figure 8 is a detail, sectional view taken on the line 8-8 of Figure 6, looking in the direction indicated by the arrows on the section line of Figure 6; and

Figure 9 is a sectional view of a part of the broken and short drill detector mechanism partly in section on the line 66 of Figure 4 showing the parts adjusted for rendering the mechanism inoperative.

Button machines of the kind with which my detector is intended to be used have a series of drill holders [0 and a cam track II which have relative movement. These drill holders cooperate with chucks which hold the button blanks, which are not here shown.

On the single drill holder 10 here illustrated is shown a pulley l2 by which the drill holder is rotated. The bearings for the drill holder are not illustrated.

At the lower end of the drill holder is a collar 13 below which is mounted the drill 14.

It will be understood that the drill holders [0 move up and down depending upon their positions relative to the cam track H for effecting the drilling of holes in the button blanks.

My improved detector may be mounted on the button machine as an attachment or may be made part of the original installation.

Drill detector mounting Referring now to Figure l, I provide a mounting for my drill detector comprising a bracket indicated generally at A, having the vertical sleeve Hi from which projects horizontally the bracket arm 16, which rests upon the cam track I I and is secured thereto by screw bolts [1.

Other suitable means for securing the detector to the button machine might be employed.

Received in the sleeve I5 is the upper end of a support 18 which is a shaft or rod. The upper end of the support 18 has a threaded, longitudinally elongated hole IS. A screw bolt 20 is loosely extended through a washer 2| resting on top of the sleeve I5 and is screwed into the opening 19 for adjusting the support l8 and the mechanism on the lower end thereof (hereinafter to be described) at the proper height.

The support l8 may be locked in its adjusted position by means of a set screw 22 in the sleeve 15.

Rigidly mounted on the lower end of the support [8 is a bracket indicated generally at B. The bracket B has a sleeve-like portion 23 which receives the lower end of the support [8 and is fastened thereto by a pin 24.

'Viewing the bracket in top elevation as shown in Figure 4, it will be observed that there is a web 25 extending laterally in both directions from the rear part of the sleeve-like portion 23. At the right-hand end of the web 25 as shown in Figure 4 is a rearwardly extending block-like portion 26. At the left-hand end of the web 25 as shown in Figure 4 is a rearwardly extending lug 21. Pivotally mounted against the rear face of the lug 2! is an arm 28 which extends in both directions laterally from the lug 21.

At the left-hand end of the arm 28 is a foot 29, the upper surface of which is inclined as at 30 at one end to engage the drill l4 whereby the inclined portion will engage the foot and as the thicker portion reaches the point of the drill, the left-hand end of the arm 28 will be tilted downwardly for operating part of the detector mechanism. That is to say as the foot 29 travels under the drill, the inclined face 30 engages the drill and then as further relative movement of the foot and drill occur, the foot will be pressed downwardly if the drill is of full length for thus raising the right-hand end'of'the arm 28 as illustrated in Figure 4.

In Figure 6, the arm 28 is shown in its normal position and in Figure? it: is shown in its tilted position after the parts have been depresse by engagement with the full length drill.

After the foot 29 has cleared the drill, the arm 23 will drop backto its normal position shown in Figure 6.

The right-hand end of the arm 28 viewing the parts as shown in Figures 4, 6, '7 and 9 is pivoted in the lower end of a fiat block 3|, which projects upwardly from the arm 28. The block 3| above the arm 28 has a hole 32 extending through it.

In the left-hand face of the block 26 is shown in. Figure 4 is a vertical groove 33. In the lower part of the groove 33 as shown in Figures 6, 7 and 9 is a block 34 mounted for a degree of vertical adjustment. A vertically elongated hole 35 extends from the groove 33 through the block 26 and a screw 36 projects through the hole 35 and is screwed into the block 34. By loosening the screw 36, the block 34 can be adjusted upwardly and downwardly. as far as the vertically elongated hole 35 will permit.

In the upper part of the groove 33 and resting upon the block 34 in the normal adjustment of the apparatus is a block 31 from which a pin 38 projects rearwardly and a post 39 extends forwardly through a vertically elongated hole 40 extending from the groove 33 through the block 26 spaced above the hole 35.

The front end of the post 39 is threaded to receive alknurled lock nut 4|. Byloosening the nut 4|, the block 31 maybe adjusted up and downv and then by tightening the nut 4|, the block 31 can be locked in any such adjusted position.

The pin 38 projects into the hole 32 in the block 3| as clearly shown in Figures 6, 7, 8 and 9 and limits the downward movement of the block 3|.

The upward movement of the block is determined by the length of the drill I4 and the hole 32 is of such vertical elongation that the pin 38 does not interfere with the upward movement of the block 3| caused by the drill.

A hanger plate 42 is pivoted at its upper end at 43 on the support l8 and hangs downward from its pivot and carries a suitable electric switch C. The switch C has a laterally 'projecting switch operating pin 44. On the switch C is mounted a trip arm 45 having a substantially vertical portion 46 which projects into position to engage the. collar l3 on the drill post I during the relative movement of the detector mechanism and the drill post.

Normally the hanger arm 42 and the switch C and the trip. arm 45 hang in the position shown in Figure 1, 1*

The movement of the hanger arm 42 and the switch C toward the left from the position shown in Figure l is limited by a stop 41 on the web 25. A screw 48 is extended through the block 26 in line with the hanger arm 42 as shown for instance in Figure 4. The screw 48 has a threaded mounting in the block 26 and may be locked in position by the lock nut 49.

On the inner end of the screw 48 is a coil spring 58 which projects beyond such inner end and yieldingly engages the arm 42 for normally holding it at its left-hand position of movement shown in Figure 1. 7

Practical operation clined face 38 of the shoe 29 first engages the drill I4 and as the travel continues, the shoeis pushed downwardly-from the position of Figure 1 to the position of Figure 7. Y

This is on the assumption that the drill I4 is of normal length. The effect of the lowering of the shoe 29 is toraise the right-hand end of the arm 28 and thus to raise the block 3| to position shown in Figure 7 where the hole 32 in the block 3| registers with the switch operating pin 44.

The just described step of the operation moves the block 3| to an inoperative position.

When thereupon the collar I3 engages the portion 46 of the trip arm 45, the switch C is swung to the right from its position shown in Figure l to its position shown in Figure '7.

Owing to the fact that the block, 3| is then raised, the switch operating pin 44 enters the hole 32 and is not afiected.

Thusso long as the drills M are of proper length, there is no operation of the switch.

Assume now that in one of the drill posts l0, there is a broken drill |4a shown as illustrated in Figure 6. The travel of the detector past the drill causes no contact between the broken drill Ma and the foot 29, hence the arm 28 is not affected and the block 3| is not raised.

When thereupon the collar |3 engages the trip arm 45 and swings the switch C to the right as shown in Figure 6, the switch actuating finger 44 will engage the solid part of the block 3| and the switch will be actuated.

We have shown the leads and 52 connected to the switch.

It will be understood that the operation of the switch either makes or breaks an electric circuit for thus affecting mechanism connected with the switch through the media of the leads 5| and 52. For example, theoperationof the switch may serve to actuate a bell or close a circuit through a lamp or may operate another switch or mechanism for stopping the button making machine.

'The operator can then locate the broken or short drill and replace it.

There are times when it is desirable to make the whole detector inoperative and this can be readily accomplished by loosening the nut 4| and moving the block 37 upwardly from its position shown in Figure 7 to its position shown in Figure 9 and the locking of the nut.

Thereupon the pin 38 will have engaged the block 3| at the upper end of the hole 32 and will serve to hold the block 3| in its upper position where the swinging of the switch C will always cause the pin 44 to enter the hole 32 and there will be no operation of the switch C.

It will be seen from the foregoing that there has been here provided a mechanism which is rendered inoperative by engagement of a part thereof with a full length drill but which is operative to actuate the switch when there is a short or broken drill.

Obviously numerous changes could be made in the construction and arrangement of the various parts. As shown, the device includes an operative part adapted to be actuated by a drill or a part adjacent thereto and another part adapted to be actuated by a full length drill to render the first part inoperative.

It is also obvious that the swinging of the trip arm 45 might be caused to operate a great many different kinds of mechanism as well as an electric switch.

It will also be clear that the operation of the switch can be made to do a great variety of things. The switch by its operation may be closed or opened depending upon the support arrangement employed with the detector mechanism here shown.

It is my purpose to cover by my claims any modified forms of structure or use of other materials or arrangements so far as they come within the scope of my invention and my claims.

I claim as my invention:

1. The combination of a drill holder, with a broken and short drill detector, said holder and detector being mounted for relative movement and thereby to operate the detector, said detector having a deidce adapted to be moved by the drill holder, said device having a movable actuating member, said detector having also a second device adapted when in operative position to cooperate with said member when the first device is so moved, and means whereby said second device is moved to inoperative position by a full length drill carried by the holder.

2. The combination of a drill holder, with a brok n and short drill detector, said holder and detector being mounted for relative movement and thereby to operate the detector, said detector having a device including a switch adapted to be bodily moved by the drill holder, said device havin a movable switch actuating member, said detector having also a second device adapted when in operative position to cooperate with said switch actuating member when the first device is so moved, and means whereby said second device is moved to inoperative position by a full length drill carried by the holder.

3. The combination of a drill holder, with a 3- broken and short drill detector, said holder and detector being mounted for relative movement, and thereby to operate the detector, said detector having a mechanism including an actuating member adapted to be moved by relative movement of the holder and detector, and means normally engageable by said member when so moved, operable from a full length drill when the drill is carried by the holder for movement to position to clear the member when the memher is so moved.

4. The combination of a drill holder with a broken and short drill detector, said holder and detector being mounted for relative movement and thereby to operate the detector, said detector having a support adjustably mounted, a switch pivoted on the support, said switch having a movable switch actuating member, said switch being adapted to be moved on its pivot by relative movement of the holder and detector, means for engaging said member upon such pivotal movement of the switch for thereby causing the switch to be actuated, a foot adapted to be engaged by a full length drill carried by the holder and to be moved by the drill upon relative movement of the holder and detector, said means being operatively connected with the foot to be moved to position to clear the member, when the foot is actuated by a full length drill.

5. The combination of a drill holder with a broken and short drill detector, said holder and detector being mounted for relative movement and thereby to operate the detector, said detector having a support adjustably mounted, a switch pivoted on the support, said switch having a movable switch actuating member, said switch being adapted to be moved on its pivot by relative movement of the holder and detector, means to engage and actuate said member upon such pivotal movement of the switch, a foot adapted to be engaged by a full length drill carried by the holder and to be moved by the drill upon relative movement of the holder and detector, said means being operatively connected with the foot, whereby when the foot is so moved by a full length drill the means is moved to position to clear the member.

6. The combination of a drill holder with a broken and short drill detector, said holder and detector being mounted for relative movement and thereby to operate the detector, said detector having a support adjustably mounted, a switch pivoted on the support, said switch having a movable switch actuating member, said switch being adapted to be moved on its pivot by relative movement of the holder and detector, and means adapted when in normal position to cooperate with said member, when the switch is so moved, said means including parts adapted to be engaged by a full length drill carried by the holder for moving the means to inoperative position.

'7. The combination of a drill holder, with a broken and short drill detector, said holder and detector being mounted for relative movement, thereby to operate the detector, said detector including a switch and including means for operating the switch when the holder carries a short or broken drill, said means including a movable element adapted to be engaged and moved by a full length drill carried by the holder, to a position to render the switch operating means inoperative.

8. In a broken drill detector, a support, a member thereon adapted to be moved from one position to another, a movable member mounted on said support adapted to be engaged by a drill carried by a drill holder upon relative movement of the drill holder and the support, and to be moved by such drill and to thereby move said first member to a given position, a third member movably mounted on said support and means adapted to be actuated upon relative movement of the support and drill holder for moving said third member, the first member being mounted so that when in normal position it will be engaged by said third member upon such movement of the third member but when so actuated by the second member it will be out of position to be so engaged by the third member.

9. A broken and short drill detector, comprising a support, a member carried by and movable on the support, adapted to be actuated upon relative movement of the support and a drill holder, a second member normally positioned to be engaged by said member when the member is so actuated, and means carried by and movable on the support, adapted to be engaged and moved by a full length drill carried by such drill holder, and to thereupon move said means out of the path of engagement with said member.

10. A broken and short drill detector, comprising a support, a switch thereon, movably mounted on the support and adapted upon relative movement of the support and a drill holder to be relatively moved to position to engage each other to operate the switch, and means adapted upon such relative movement of the support and drill holder to be engaged by a full length drill carried by the holder, and moved thereby to move one of said elements away from position for engaging the other element for switch operation.

EDWARD C. CAR/BIS. 

